Pass the path using the --prefix option instead of on the command line.
tree4bb7bc565fae478b08974b3bc5823c2f762b9870
-rw-r--r-- 3 .gitignore
lrwxrwxrwx 14 git-subtree -> git-subtree.sh
-rwxr-xr-x 6320 git-subtree.sh
-rw-r--r-- 23 shellopts.sh
-rwxr-xr-x 1926 test.sh